EEG Feature Extraction and Data Augmentation in Emotion Recognition

Table 2

Extracted features.

Index	Features type	Channel	Frequency (Hz)	Features	No. of features
1	EEG power features	Fp1, AF3, F3, F7, FC5, FC1, C3, T7, CP5, CP1, P3, P7, PO3, O1, Oz, Pz, Fp2, AF4, Fz, F4, F8, FC6, FC2, Cz, C4, T8, CP6, CP2, P4, P8, PO4, O2	Theta (4–8) slow-alpha (8–10) alpha (8–12) beta (12–30) gamma (30–45)	Average PSD	160
2	EEG power differences	(Fp2- Fp1), (AF4- AF3), (F4-F3), (F8-F7), (FC6-FC5), (FC2-FC1), (C4- C3), (T8-T7), (CP6- CP5), (CP2-CP1), (P4- P3), (P8-P7), (PO4- PO3), (O2- O1)	Theta alpha beta gamma	Difference of average PSD in theta, alpha, beta, and gamma bands for 14 EEG channel pairs between right and left scalp	56
3	EEG time- domain features	Fp1, AF3, F3, F7, FC5, FC1, C3, T7, CP5, CP1, P3, P7, PO3, O1, Oz, Pz, Fp2, AF4, Fz, F4, F8, FC6, FC2, Cz, C4, T8, CP6, CP2, P4, P8, PO4, O2	—	Mean variance zero-crossing rate	128